Changeing mysql root password

Hi
I have changed my root mysql password in shell and in ispconfig ,but now have errors when tryying to log on to ispconfig .
I used this to change {mysqladmin -u root password yourrootsqlpassword} in shell
and in here changed to the same{ /home/admispconfig/ispconfig/lib/config.inc.php}
this is one of many errors when tryying to connect [Warning: mysql_connect() [function.mysql-connect]: Access denied for user 'root'@'localhost' (using password: YES)]
is running on ubuntu 6.10